CN215018777U - Pedicle of vertebral arch extension inflation bone cement screw - Google Patents
Pedicle of vertebral arch extension inflation bone cement screw Download PDFInfo
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- CN215018777U CN215018777U CN202120556837.XU CN202120556837U CN215018777U CN 215018777 U CN215018777 U CN 215018777U CN 202120556837 U CN202120556837 U CN 202120556837U CN 215018777 U CN215018777 U CN 215018777U
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- screw
- pedicle
- bone cement
- thread
- solid
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- 239000002639 bone cement Substances 0.000 title claims abstract description 38
- 239000007787 solid Substances 0.000 claims abstract description 55
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 9
- 230000001054 cortical effect Effects 0.000 claims abstract description 7
- 239000011295 pitch Substances 0.000 claims description 7
- 208000001132 Osteoporosis Diseases 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 238000005728 strengthening Methods 0.000 abstract description 3
- 239000012466 permeate Substances 0.000 abstract description 2
- 206010025005 lumbar spinal stenosis Diseases 0.000 description 3
- 208000005198 spinal stenosis Diseases 0.000 description 3
- 230000032683 aging Effects 0.000 description 1
- 230000003262 anti-osteoporosis Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002695 general anesthesia Methods 0.000 description 1
- 238000002690 local anesthesia Methods 0.000 description 1
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Abstract
Pedicle of vertebral arch extension inflation bone cement screw, hollow pedicle of vertebral arch screw is installed to pedicle of vertebral arch extension screw body front end, and hollow pedicle of vertebral arch screw is equipped with first external screw thread outward, is equipped with the side opening between the first external screw thread, and the downthehole bone cement that has poured into of side opening is equipped with first internal thread in the hollow pedicle of vertebral arch screw, and solid combination screw is installed to first internal thread combination. The utility model has the advantages that: the pedicle screw for lengthening and expanding bone cement permeates bone cement into a vertebral body through the side hole and is hardened, has strong holding force, adopts a bone cement strengthening method to make the pedicle screw resist osteoporosis, and avoids the situation that the screw is loosened and displaced in the vertebral body due to the osteoporosis or the broken end of the pedicle screw slides back to the original position due to the osteoporosis after being lengthened; the expansion nut is screwed in along with the solid combined screw, the expansion shell is pulled by the three petals to be opened and firmly locked with the cortical bone, and failure of extension of the pedicle of vertebral arch caused by insufficient holding force of the tail end is avoided.
Description
Technical Field
The utility model relates to a pedicle of vertebral arch extension inflation bone cement screw belongs to medical equipment technical field.
Background
With the aggravation of social aging, the incidence rate of lumbar spinal stenosis is higher and higher, the elderly are difficult to bear larger operations, the elderly with great general anesthesia risks are more and more, and the minimally invasive treatment of lumbar spinal stenosis is called as a problem to be continuously solved. Minimally invasive pedicle extension can reach and enlarge central spinal canal, side recess and intervertebral foramen simultaneously through the extension pedicle of vertebral arch, need not excise the vertebral lamina, also need not handle the intervertebral space, can go on under the local anesthesia, is the feasible art formula of treatment old lumbar spinal stenosis disease, but because the surgical instruments problem, still can't promote in the clinic. Therefore, if the problem of surgical instruments for minimally invasive pedicle extension can be effectively solved, the technique can be well popularized.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pedicle of vertebral arch extension inflation bone cement screw.
The to-be-solved problem of the utility model is the defect that the surgical instruments of the existing minimally invasive pedicle of vertebral arch lengthening operation can not lead the operation to be clinically popularized.
For realizing the purpose of the utility model, the utility model adopts the technical proposal that:
pedicle of vertebral arch extension inflation bone cement screw, including pedicle of vertebral arch extension screw body, hollow pedicle of vertebral arch screw, first external screw thread, side opening, bone cement, first internal thread, solid combination screw, first solid screw, second external screw thread, micro-motion device, second solid screw, third external screw thread, fourth external screw thread, latter half support back-open screw, expansion nut, annular hollow screw, second internal thread and carry and draw the inflation shell, characterized by: the front end of the pedicle of vertebral arch extension screw body is provided with a hollow pedicle screw, a first external thread is arranged outside the hollow pedicle screw, a side hole is arranged between the first external threads, bone cement is injected into the side hole, a first internal thread is arranged in the hollow pedicle screw, a solid combined screw is assembled and installed on the first internal thread, a first solid screw is arranged at the front end of the solid combined screw, a second external thread is arranged outside the first solid screw, a micro-motion device is arranged in the tail end of the first solid screw, a second solid screw is arranged behind the micro-motion device, a third external thread is arranged at the front end part of the second solid screw, a fourth external thread is arranged behind the third external thread, a rear half support jacking screw is arranged at the tail part of the second solid screw, an expansion nut is assembled and installed on the rear half support jacking screw, an annular hollow screw is arranged at the front end of the expansion nut, and a second internal thread is arranged in the annular hollow screw, the tail end of the annular hollow screw is provided with a three-piece lifting expansion shell.
Furthermore, the pedicle extension screw body consists of a hollow pedicle screw, a solid combined screw and an expansion nut.
Furthermore, the length of the hollow pedicle screw is 30-35mm, the length of the second solid screw is 15-20mm, and the length of the annular hollow screw is 3-4 mm.
Furthermore, the hollow pedicle screw is provided with different length and diameter models according to different patients, and can be combined with the hollow handle.
Further, the thread pitches of the first external thread, the second external thread, the third external thread and the fourth external thread are different; the thread and the thread space of the third external thread are large; the distance between the threads of the second external thread and the threads is small, and the difference between the thread distances is controllable.
Further, the hollow pedicle screw is combined with the solid combined screw at the pedicle osteotomy plane.
Further, the micro-motion device is a one-way rotation device.
Furthermore, the thickness of the lifting expansion shell is gradually increased, and the three-petal lifting expansion shell can be opened along with the screwing of the solid combined screw to be firmly locked with the cortical bone.
Further, the position of the lifting expansion shell can be adjusted according to different pedicle tail cortices, and the expansion degree is larger the farther forward.
Furthermore, the diameter of the back half support ejection screw is gradually increased, and the diameter size of the tail end of the back half support ejection screw is larger than that of the three-clack lifting expansion shell.
The utility model has the advantages that: the pedicle screw for lengthening and expanding bone cement permeates bone cement into a vertebral body through the side hole and is hardened, has strong holding force, adopts a bone cement strengthening method to make the pedicle screw resist osteoporosis, and avoids the situation that the screw is loosened and displaced in the vertebral body due to the osteoporosis or the broken end of the pedicle screw slides back to the original position due to the osteoporosis after being lengthened; the expansion nut is screwed in along with the solid combined screw, the expansion shell is pulled by the three petals to be opened and firmly locked with the cortical bone, and failure of extension of the pedicle of vertebral arch caused by insufficient holding force at the tail end is avoided; according to different intervals of the threads on the solid combined screw, the extension distance of the vertebral pedicle is controllable by controlling the interval difference of the threads.
Drawings
FIG. 1 is a schematic structural view of a pedicle extension expansion bone cement screw;
FIG. 2 is a schematic view of an assembled structure of a pedicle extension expansion bone cement screw;
in the figure: 1. the pedicle extension screw comprises a pedicle extension screw body 2, a hollow pedicle screw 3, a first external thread 4, a side hole 5, bone cement 6, a first internal thread 7, a solid combined screw 8, a first solid screw 9, a second external thread 10, a micro-motion device 11, a second solid screw 12, a third external thread 13, a fourth external thread 14, a rear half support jacking screw 15, an expansion nut 16, an annular hollow screw 17, a second internal thread 18 and a lifting expansion shell.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
The pedicle extension expansion bone cement screw comprises a pedicle extension screw body 1, a hollow pedicle screw 2, a first external thread 3, a side hole 4, bone cement 5, a first internal thread 6, a solid combined screw 7, a first solid screw 8, a second external thread 9, a micro-motion device 10, a second solid screw 11, a third external thread 12, a fourth external thread 13, a rear half support jacking screw 14, an expansion nut 15, an annular hollow screw 16, a second internal thread 17 and a lifting expansion shell 18, wherein the hollow pedicle screw 2 is installed at the front end of the pedicle extension screw body 1 and used for screwing a pedicle osteotomy plane to reach a proper part of a vertebral body, the first external thread 3 is arranged outside the hollow pedicle screw 2 and used for threaded connection, the side hole 4 is formed between the first external threads 3 and used for injecting the bone cement, the bone cement 5 is injected into the side hole 4 and used for enhancing holding force, the anti-osteoporosis hollow pedicle screw 2 is internally provided with a first internal thread 6 for threaded connection, the first internal thread 6 is combined with a solid combined screw 7 for extending the pedicle of vertebral arch, the front end of the solid combined screw 7 is provided with a first solid screw 8 for extending the pedicle of vertebral arch, the first solid screw 8 is externally provided with a second external thread 9 for threaded connection, the tail end of the first solid screw 8 is internally provided with a micro-motion device 10 for unidirectional adjustment, the rear part of the micro-motion device 10 is provided with a second solid screw 11 for combining an expansion nut, the front end part of the second solid screw 11 is provided with a third external thread 12 for threaded connection, the rear part of the third external thread 12 is provided with a fourth external thread 13 for threaded connection, the tail part of the second solid screw 11 is provided with a rear half support jacking screw 14 for jacking and supporting a lifting expansion shell, the rear half support jacking screw 14 is combined with an expansion nut 15, the expansion nut is used for locking cortical bone, an annular hollow screw 16 is arranged at the front end of the expansion nut 15 and used for combining solid combined screws, a second internal thread 17 is arranged in the annular hollow screw 16 and used for threaded connection, and a three-piece lifting expansion shell 18 is arranged at the tail end of the annular hollow screw 16 and used for locking cortical bone.
Further, the pedicle extension screw body 1 consists of a hollow pedicle screw 2, a solid combined screw 7 and an expansion nut 15.
Further, the length of the hollow pedicle screw 2 is 30-35mm, the length of the second solid screw 11 is 15-20mm, and the length of the annular hollow screw 16 is 3-4 mm.
Further, the hollow pedicle screw 2 is provided with different length and diameter models according to different patients, and can be combined with a hollow handle.
Further, the thread pitches of the first external thread 3, the second external thread 9, the third external thread 12 and the fourth external thread 13 are all different; the thread and thread pitch of the third external thread 12 is large; the thread and the thread spacing of the second external thread 9 are small, and the thread spacing difference is controllable.
Further, the hollow pedicle screw 2 is combined with a solid combination screw 7 at the pedicle osteotomy plane.
Further, the micro-motion device 10 is a unidirectional rotation device.
Furthermore, the thickness of the lifting expansion shell 18 is gradually increased, and the three-petal lifting expansion shell 18 can be opened along with the screwing of the solid combined screw 7 and is firmly locked with cortical bone.
Further, the position of the lifting expansion shell 18 can be adjusted according to different pedicle tail cortex, and the expansion degree is larger the farther forward.
Further, the diameter of the rear half support back-open screw 14 is gradually increased, and the diameter size of the tail end of the rear half support back-open screw 14 is larger than that of the three-petal lifting expansion shell 18.
The using method comprises the following steps: according to the condition of a patient, selecting hollow pedicle screws 2 with different lengths and diameters, screwing the hollow pedicle screws 2 through a pedicle bone cutting plane under the control of a combined hollow handle to reach a proper part of a vertebral body, injecting bone cement 5 through the hollow handle, infiltrating the bone cement 5 into the vertebral body through side holes 4 and hardening the bone cement, and having strong holding force, wherein the bone cement strengthening is a common method for resisting osteoporosis of the existing pedicle screws; after the pedicle of a vertebra is cut, screwing the solid combined screw 7 into the hollow pedicle screw 2 for combination on a bone cutting plane, extending the pedicle of a vertebra according to different thread pitches of the second external thread 9 and the third external thread 12 in the process of screwing the second solid screw 11 for combination, and firmly locking the expansion nut 15 with the cortex of the vertebra, wherein the extension distance of the pedicle of a vertebra is controllable because the thread pitch difference of the third external thread 12 is controllable, for example, 1 turn of the pedicle of a vertebra is extended by 1 mm; the position of the expansion nut 15 is adjusted according to different pedicle tail cortex, and the expansion degree is larger the farther forward.
Claims (10)
1. Pedicle of vertebral arch extension inflation bone cement screw, including pedicle of vertebral arch extension screw body (1), hollow pedicle of vertebral arch screw (2), first external screw thread (3), side opening (4), bone cement (5), first internal thread (6), solid combination screw (7), first solid screw (8), second external screw thread (9), micro-motion device (10), second solid screw (11), third external screw thread (12), fourth external screw thread (13), latter half support back-open screw (14), expansion nut (15), annular hollow screw (16), second internal thread (17) and carry and draw expansion shell (18), characterized by: the pedicle of vertebral arch extension screw is characterized in that a hollow pedicle screw (2) is installed at the front end of a pedicle of vertebral arch extension screw body (1), first external threads (3) are arranged outside the hollow pedicle screw (2), side holes (4) are formed between the first external threads (3), bone cement (5) is injected into the side holes (4), first internal threads (6) are arranged in the hollow pedicle screw (2), solid combination screws (7) are installed in the first internal threads (6) in a combined mode, first solid screws (8) are arranged at the front ends of the solid combination screws (7), second external threads (9) are arranged outside the first solid screws (8), micro-motion devices (10) are arranged in the tail ends of the first solid screws (8), second solid screws (11) are arranged behind the micro-motion devices (10), third external threads (12) are arranged on the front end portions of the second solid screws (11), fourth external threads (13) are arranged behind the third external threads (12), the tail part of the second solid screw (11) is provided with a rear half support jacking screw (14), the rear half support jacking screw (14) is provided with an expansion nut (15) in a combined mode, the front end of the expansion nut (15) is provided with an annular hollow screw (16), a second internal thread (17) is arranged in the annular hollow screw (16), and the tail end of the annular hollow screw (16) is provided with a three-piece lifting expansion shell (18).
2. The pedicle extension expansion bone cement screw as claimed in claim 1, wherein: the pedicle extension screw body (1) consists of a hollow pedicle screw (2), a solid combined screw (7) and an expansion nut (15).
3. The pedicle extension expansion bone cement screw as claimed in claim 1, wherein: the length of the hollow pedicle screw (2) is 30-35mm, the length of the second solid screw (11) is 15-20mm, and the length of the annular hollow screw (16) is 3-4 mm.
4. The pedicle extension expansion bone cement screw as claimed in claim 1, wherein: the hollow pedicle screw (2) is provided with different length and diameter models according to different patients, and can be combined with a hollow handle.
5. The pedicle extension expansion bone cement screw as claimed in claim 1, wherein: the thread pitches of the first external thread (3), the second external thread (9), the third external thread (12) and the fourth external thread (13) are different; the thread and the thread pitch of the third external thread (12) are large; the distance between the threads of the second external thread (9) and the threads is small, and the difference between the thread distances is controllable.
6. The pedicle extension expansion bone cement screw as claimed in claim 1, wherein: the hollow pedicle screw (2) is combined with the solid combined screw (7) on the pedicle osteotomy plane.
7. The pedicle extension expansion bone cement screw as claimed in claim 1, wherein: the micro-motion device (10) is a unidirectional rotation device.
8. The pedicle extension expansion bone cement screw as claimed in claim 1, wherein: the thickness of the lifting expansion shell (18) is gradually increased, and the three-petal lifting expansion shell (18) can be expanded along with the screwing of the solid combined screw (7) and is firmly locked with cortical bone.
9. The pedicle extension expansion bone cement screw as claimed in claim 1, wherein: the position of the lifting expansion shell (18) can be adjusted according to different pedicle tail cortex, and the expansion degree is larger the farther forward.
10. The pedicle extension expansion bone cement screw as claimed in claim 1, wherein: the diameter of the rear half support ejection screw (14) is gradually increased, and the diameter size of the tail end of the rear half support ejection screw (14) is larger than that of the three-clack lifting expansion shell (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120556837.XU CN215018777U (en) | 2021-03-18 | 2021-03-18 | Pedicle of vertebral arch extension inflation bone cement screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120556837.XU CN215018777U (en) | 2021-03-18 | 2021-03-18 | Pedicle of vertebral arch extension inflation bone cement screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215018777U true CN215018777U (en) | 2021-12-07 |
Family
ID=79153948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120556837.XU Expired - Fee Related CN215018777U (en) | 2021-03-18 | 2021-03-18 | Pedicle of vertebral arch extension inflation bone cement screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215018777U (en) |
-
2021
- 2021-03-18 CN CN202120556837.XU patent/CN215018777U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211207 |